On Mon, Aug 10, 2009 at 05:16:27PM -0500, Bob Friesenhahn wrote: > On Mon, 10 Aug 2009, Thomas Burgess wrote: > > >i think you can add different types of vdevs but doesn't it make you use > >-f? > >i thought it was "not a good idea" > > I have no idea. I am not brave enough to try it with my own pool and > am too lazy to test with files. > > There are lots of things you can do wrong. For example, you could > have two vdevs with the same organization, but with radically > different disk performance.
If I'm not mistaken, the "only downside" to mixing and matching disks and/or vdev types is that the entire zpool's performance is limited by the lowest common denominator. Add a fast mirror to your slow raidz pool and you'll only increase the space. Add a slow raidz vdev to your fast mirror pool and you'll add space and reduce the performance. I'm not 100% sure on that, but I seem to remember that being the only potential problem. -brian -- "Coding in C is like sending a 3 year old to do groceries. You gotta tell them exactly what you want or you'll end up with a cupboard full of pop tarts and pancake mix." -- IRC User (http://www.bash.org/?841435) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
